Here's why. Google is killing it on AI -- that's everything from its Google Assistant to a cool-looking feature that can copy a Wi-Fi password when you point the camera at it.

Apple isn't dead in the water by any stretch. It has a chance to catch up if it's able to make AR -- which mashes up virtual items with the actual world -- seriously mainstream.

But...

We don't actually know which OS is really making the more important strides until we can see the completed software side by side (expect September for iOS 11 and possibly late August for Android Oreo).

Apple and Google may be saving even more software revelations for the "iPhone 8" and "Google Pixel 2" phones (the latter of which is expected in October).

The best additions aren't strictly tied to iOS or Android at all, but the flagship hardware instead.

Flashiest new features

Android Oreo:

Shrinking a video orGoogle Mapsnavigation into a floating thumbnail so you can keep an eye on it while you do other things (called picture-in-picture)

Auto-selecting a name, phone number, address or business to copy/paste

Winner so far: Android Oreo. Picture-in-picture and the enhanced copy/paste are little things that can go a long way in making the phone more useful day-to-day. And unlike iOS, Android phones could already play music from the phone to multiple speakers (as long as they're Chromecast-compatible).

However, peer-to-peer payments in iMessage is a great addition to the native messaging app (which Android lacks on all phones).

Voice assistant

Apple hasSiriand Android has Android Assistant (and Google Voice Search and Google Now). Siri gets a bunch of updates to make it look better, give it a new male voice and guess what you might want to know next. Google Assistant will get a mode that can identify objects (calledGoogle Lens) and the ability to type queries, not just speak them.

Winner so far: Android Oreo, even though voice additions are ho-hum. The underlying platform is so much more expansive, accurate and knowledgeable than Siri. AtWWDC, Apple missed an opportunity to showcase the digital assistant it helped make a sensation in the first place. It'll have a chance to redeem itself in September during theexpectedreveal of the newiPhone(s).

(Android does have P2P payment with Google Wallet, but you'll need to install and set up the app.)

Winner so far: iOS 11. It rewards iOS users with a ton of special features, like text effects, seamless Wi-Fi and SMS texting and now in-message peer-to-peer payments.

Nuts and bolts

Since Apple controls both hardware and software, it doesn't have Google's problem of needing to create one operating system for hundreds of different devices made by dozens of brands. But that also means Google is more proactive about sharing its plans to make its OS faster and improve battery life.

Winner so far: Android Oreo, maybe. Google claims Android Oreo is more than twice as fast as last year's OS, and boots up faster, too. It's also done behind-the-scenes work to preserve battery life. Apple hasn't highlighted these improvements, but its devices don't face the same kinds of issues. We'll have to compare the next iPhone with the next Pixel to see how battery life and speed shake out.

5 new features on Android O

Design Improvements

Apple has redesigned iOS 11's lock screen, Control Center, Siri interface and app store. Android Oreo has a few visual tweakshere and there, but not to iOS' scale.

Winner so far: iOS 11. We like what we've seen for far -- especially with the refreshed Control Center -- but we're dubious about how the new App Store will pan out.

AR and VR

Android is years ahead of Apple with both augmented and virtual reality -- it has Google Daydream for VR, Tango for AR, and recently announced a standalone headset. Apple is just getting its feet wet with AR, but the company claims it'll have the world's largest augmented reality platform when it launches itsARKit developer platformlater this year.

Winner so far: Android for VR. AR could be up in the air. Google's Tango project is still slow to get underway. If Apple makes good on a rumor that the iPhone camera will get AR capabilities, it could leapfrog Google's progress.

What else?

AppleandGoogleare both pouring a ton of research into AI (artificial intelligence), to make their digital assistants and tools smarter and more context-aware.

Google is also working on projects likeInstant Apps, little mini apps you can open without downloading a thing. It isn't technically part of Android, but will find its way into phones. I was impressed by the concept ofGoogle Lens, which lets you identify objects on the fly, among other things.

Saving the best for last?

It's not over yet. Google and Apple are notorious for saving some OS features to reveal alongside their new flagship phones.

Right now, Google's software for phones pushes ahead in important ways, but Apple has one more chance to wow us. It's10th anniversary iPhoneis rumored to have sweeping changes. It's just the sort of debut where you'd want to save the best new software features for last.

So Apple's AR code could transform into a killer feature on the next iPhone's camera. Or, if Apple does wind up ditching the iPhone home button, more hands-free Siri tricks could come to the fore.

Those are moves Apple would want to keep tucked away until the big moment when it can stick it to Android Oreo. Unless Android Oreo on the upcoming Pixel phone hits back with a final jaw-dropper of its own.